﻿using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Data.Objects;
using System.Data.Objects.DataClasses;
using System.Web.DynamicData;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class ManyToManyField : System.Web.DynamicData.FieldTemplateUserControl {
    protected override void OnDataBinding(EventArgs e) {
        base.OnDataBinding(e);

        object entity;
        ICustomTypeDescriptor rowDescriptor = Row as ICustomTypeDescriptor;
        if (rowDescriptor != null) {
            // Get the real entity from the wrapper
            entity = rowDescriptor.GetPropertyOwner(null);
        } else {
            entity = Row;
        }

        // Get the collection and make sure it's loaded
        RelatedEnd entityCollection = Column.EntityTypeProperty.GetValue(entity, null) as RelatedEnd;
        if (entityCollection == null) {
            throw new InvalidOperationException(String.Format("The ManyToMany template does not support the collection type of the '{0}' column on the '{1}' table.", Column.Name, Table.Name));
        }
        if (!entityCollection.IsLoaded) {
            entityCollection.Load();
        }

        // Bind the repeater to the list of children entities
        Repeater1.DataSource = entityCollection;
        Repeater1.DataBind();
    }

    public override Control DataControl {
        get {
            return Repeater1;
        }
    }

}
